30L Speidel Fermentor Thermowell

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30L Speidel Fermentor Thermowell

Unread postby PerzellBrewing » Sat Apr 30, 2016 5:24 am

Hey all. Was wondering if any of you have used the following as a thermowell for your fermentors. I have several 30L and want to get a thermowell in, but don't know about putting one in side or lid. Thoughts?

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Re: 30L Speidel Fermentor Thermowell

Unread postby PerzellBrewing » Sat Apr 30, 2016 5:48 am

Also seeing where some say just drill into the side and install a SS Brewtech Thermowell

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Re: 30L Speidel Fermentor Thermowell

Unread postby mashy » Sun May 01, 2016 5:37 am

For 30l you would be better off imo with an IR temp gun. That way you could get a range of temps.

You are fixing a problem that isn't there by fitting one and creating potential leak / hygiene issues.

... And you will also find million other uses for the gun. Really useful. Good kit.
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Re: 30L Speidel Fermentor Thermowell

Unread postby PerzellBrewing » Sun May 01, 2016 1:00 pm

mashy wrote:For 30l you would be better off imo with an IR temp gun. That way you could get a range of temps.

You are fixing a problem that isn't there by fitting one and creating potential leak / hygiene issues.

... And you will also find million other uses for the gun. Really useful. Good kit.

IR temp guns only gives you surface temp readings and would be highly inaccurate for temp readings during fermentation. I already own one.
I am looking for a way to have a temp probe in fermentation vessel that is connected to temp controller. That is the most precise way to take ferm temps.
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Re: 30L Speidel Fermentor Thermowell

Unread postby Kyle_T » Sun May 01, 2016 1:12 pm

If using plastic go through the lid then there is no leak potential and it'll read the temperature fine.
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Re: 30L Speidel Fermentor Thermowell

Unread postby mashy » Sun May 01, 2016 9:28 pm

Is this for a fermentation fridge /enclosure? What are you effecting the heating and cooling with please?
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Re: 30L Speidel Fermentor Thermowell

Unread postby PerzellBrewing » Sun May 01, 2016 9:59 pm

Yes it is for ferm chamber. The cooling will be the freezer and heat source will be a light bulb. The temp will be controlled by a temp controller with a temp probe.
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Re: 30L Speidel Fermentor Thermowell

Unread postby mashy » Mon May 02, 2016 7:42 am

I don't think this will give you the most successful outcome.

In the past I have got the best results monitoring and controlling the environment - air - temp. This will allow the brew a buffer.

Other thoughts...
Switching a freezer in this manner doesn't do them any good. This is not there temp range.

Air flow management helps. Vents.

Yeast don't necessarily want an absolute temp.

Yeast don't defo don't want rapid change.

Your ambient temp will help you decide the best way.

Commercial guys use thermowells on HUGE tanks. IMO that's a different solution for a different problem.
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Re: 30L Speidel Fermentor Thermowell

Unread postby PerzellBrewing » Mon May 02, 2016 10:30 am

Thanks Mashy, but I will agree to disagree here.
Everything you described can be overcome with the temp controller.
So all that aside, do you have any thoughts on best way to do thermowell on fermenter?
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Re: 30L Speidel Fermentor Thermowell

Unread postby mashy » Mon May 02, 2016 12:47 pm

Lol. First thought is don't. :D

Second thought is defo through the lid. This will also make it transferable to other fermenters at not cost.
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Re: 30L Speidel Fermentor Thermowell

Unread postby PerzellBrewing » Thu May 05, 2016 6:27 pm

So have decided to do this route (per Mashy & Kyle). I am going to purchase another lid from Morebeer (Replacement Lid for 20/30L Fermenter) and then a long thermowell (this one probably ) along with a grommet to make it air tight.

Got the idea from this post over at homebrewtalk.com (link to forum)

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Re: 30L Speidel Fermentor Thermowell

Unread postby PerzellBrewing » Thu May 05, 2016 6:35 pm

Strike that! I just found the replacement lids at Adventures in Homebrewing (here) for cheaper than Morebeer. :beer:
Last edited by PerzellBrewing on Thu May 05, 2016 9:52 pm, edited 1 time in total.
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Re: 30L Speidel Fermentor Thermowell

Unread postby RichM » Thu May 05, 2016 9:43 pm

mashy wrote:I don't think this will give you the most successful outcome.

In the past I have got the best results monitoring and controlling the environment - air - temp. This will allow the brew a buffer.


I agree to a degree with this, the laws of thermodynamics suggests that air cools and warms quicker than liquid, which would suggest that its logical to control the ambient temperature, which with a plastic fermenter works well and its how i've accurately brewed till now. I've now moved to a SS fermenter that has a thermowell and found that the steel seemed to prevent accurate temperature control if measuring ambient, the solution is to use the thermowell to measure the temperature of the inside which has seemed to maintain constant temperature, to prove the difference i've left an additional thermometer probe inside the fridge and its maintained a temperature about 2 degrees different to the STC-1000 setting.
Admittedly i've only brewed with the SS fermenter once, so i'm still in experimental mode.
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Re: 30L Speidel Fermentor Thermowell

Unread postby mashy » Fri May 06, 2016 5:49 am

Spot on. That makes sense as ss is a conductor not an insulator like plastic.

One on the (many) reasons I have stayed with plastic fermenters.

Will be really interested to hear if you detect a difference in the product.
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Re: 30L Speidel Fermentor Thermowell

Unread postby RichM » Fri May 06, 2016 6:25 am

mashy wrote:Spot on. That makes sense as ss is a conductor not an insulator like plastic.

One on the (many) reasons I have stayed with plastic fermenters.

Will be really interested to hear if you detect a difference in the product.


Its to early to say for sure but the ambient temperature was different from he internal temperature and didn't seem to even out over the course of two weeks, which to me suggests this.

As a side effect, i did notice the beer came out of the SS fermenter very clean when i ran if of to a clean fermenter
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